nsGenConImageContent.cpp

/* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is nsGenConImageContent. * * The Initial Developer of the Original Code is the Mozilla Foundation. * Portions created by the Initial Developer are Copyright (C) 2004 * the Initial Developer. All Rights Reserved. * * Contributor(s): * L. David Baron <dbaron@dbaron.org> (original author) * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** *//** * A fake content node class so that the image frame for * content: url(foo); * in CSS can have an nsIImageLoadingContent but use an * imgIRequest that's already been loaded from the style system. */#include "nsContentCreatorFunctions.h"#include "nsXMLElement.h"#include "nsImageLoadingContent.h"#include "imgIRequest.h"#include "nsIEventStateManager.h"00051class nsGenConImageContent : public nsXMLElement,
public nsImageLoadingContent
{
public:
nsGenConImageContent(nsINodeInfo* aNodeInfo)
: nsXMLElement(aNodeInfo)
{
}
nsresult Init(imgIRequest* aImageRequest)
{
// No need to notify, since we have no frame.return UseAsPrimaryRequest(aImageRequest, PR_FALSE);
}
// nsIContent overridesvirtual PRInt32 IntrinsicState() const;
private:
virtual ~nsGenConImageContent();
public:
NS_DECL_ISUPPORTS_INHERITED
};
NS_IMPL_ISUPPORTS_INHERITED3(nsGenConImageContent, nsXMLElement,
nsIImageLoadingContent, imgIContainerObserver, imgIDecoderObserver)
nsresult
NS_NewGenConImageContent(nsIContent** aResult, nsINodeInfo* aNodeInfo,
imgIRequest* aImageRequest)
{
NS_PRECONDITION(aImageRequest, "Must have request!");
nsGenConImageContent *it = newnsGenConImageContent(aNodeInfo);
if (!it)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult = it);
nsresult rv = it->Init(aImageRequest);
if (NS_FAILED(rv))
NS_RELEASE(*aResult);
return rv;
}
nsGenConImageContent::~nsGenConImageContent()
{
DestroyImageLoadingContent();
}
PRInt32
nsGenConImageContent::IntrinsicState() const{
PRInt32 state = nsXMLElement::IntrinsicState();
PRInt32 imageState = nsImageLoadingContent::ImageState();
if (imageState & NS_EVENT_STATE_BROKEN) {
// We should never be in an error state; if the image fails to load, we// just go to the suppressed state.
imageState |= NS_EVENT_STATE_SUPPRESSED;
imageState &= ~NS_EVENT_STATE_BROKEN;
}
imageState &= ~NS_EVENT_STATE_LOADING;
return state | imageState;
}